To understand the point of the last video we must first understand what is meant by "bolt lens". I don't have the foggiest idea.

I assume it is "loose bolt"

Just to explain to whom is interested, in Italian the adjective "loose" is translated "lento", that means also "slow" and in this form is far more used.There's also a noun very similar, that is "lente" and means "lens" (optical)

I'm no expert but the left bearing looks like water damage to me. But if MG stated that he never pressure washed it then the lack of lube from factory must be the case.I rarely open sealed bearings as I'm usually confident of them having enough lube from factory...but this ruins that confidence and I guess I'll go in and repack all my wheel bearings this winter (especially after seeing the damage that not doing it could do).

I usually use Shell moly grease in most applications but with high speed bearings is there something better?

I am not sure if the bearing failure was caused by an assembly error or not but it is hard for me to believe that a fully tightened axle could turn inside the right hand swingarm. Assuming the sequence of events started with a bearing failure, the worst thing that could have happened would have been for the inner and outer races of the bearing locking together (i.e., siezing); after that I believe the bearing would have been ripped out of the wheel bearing bore before the axle would have turned inside the swingarm. Not to throw rocks at anyone, and I don't know the ultimate start of the failure but I also believe the axle must not have been tightened for this series of failures to happen.

Ask yourself this. What would happen if the axle nut was loose, lets say the spacer got hung up during assembly somehow, the nut felt tight, but once moving it freed itself. What will that new gap create? I really do believe this was an assembly error, we all make em. Bottom line is for whatever reason MG survived to ride another day.

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Homo Sapiens Sapiens and just a tad of Neanderthal but it usually does not show.... My Private mail is blocked; it is not you, it is me, just like that dating partner said all those years ago. Please send an e-mail if you want to contact me privately.

I am not sure if the bearing failure was caused by an assembly error or not but it is hard for me to believe that a fully tightened axle could turn inside the right hand swingarm. Assuming the sequence of events started with a bearing failure, the worst thing that could have happened would have been for the inner and outer races of the bearing locking together (i.e., siezing); after that I believe the bearing would have been ripped out of the wheel bearing bore before the axle would have turned inside the swingarm. Not to throw rocks at anyone, and I don't know the ultimate start of the failure but I also believe the axle must not have been tightened for this series of failures to happen.

The original failure that led to the "disaster" is defective right bearings.The number of spheres inside is correct, the problem is that it has been mounted with no grease at all!When I opened both the bearings, the right one was without grease whilst the left one had still a fairly amount of grease.Possible objection: no, the grease has been removed by high pressure water, you dumbass Impossible, because when the grease is present, the water simply slips away over the thin grease layer; moreover the bearing covers adequately protect the bearings from direct exposure to high pressure water (they were intact)Why then it happened after 45.000 kms???I never rode the bike for long rides, only around my place: short and frequent tirps and at an average low speed.This generated a minor overheating effect and the bearings lasted longer.Yes, but you should have heard a progressive deterioration of the bearings, some kind of noise....No, because this would happen only for normal wear with grease. The lack of grease has instead generated overheating, not the usual play/noise, that ended up in the sudden "disaster"No, it's a matter of how tight you tightened the axle: when you changed your tyre...14.000 kms ago??? and it lasted that long with no perceivable sign???In my last clip I show you that tightening more or less is seamless because in the end there's a cotter pin locking everything thus a loosening cannot happen.

What did we learn from this??Better to check when you change your tyres that the bearings are provided with grease!

Got it. Lack of grease caused the failure and it didn't reveal itself until a long ride. Since my bike has >50,000 kilometers and much of it high speed long distance I can assume my bearings have grease. My question for all is: can the seal be removed and then reinstalled without damage? If so I can check and repack at the next tire change.

Got it. Lack of grease caused the failure and it didn't reveal itself until a long ride. Since my bike has >50,000 kilometers and much of it high speed long distance I can assume my bearings have grease. My question for all is: can the seal be removed and then reinstalled without damage? If so I can check and repack at the next tire change.